A Reconfigurable Passive Mixer-Based Sub-GHz Receiver Front-End for Fast Spectrum Sensing Functionality

Wide band linearization techniques for RF receiver front-ends

“…Such receivers with the passive mixer as their first block are called mixer-first receivers, and the filtering property associated with such mixers, i.e., frequencytranslating the low-pass filter at their baseband terminal to bandpass filter at their RF terminal, is called N-path filtering [40]. Since their introduction in 2006, various architectures of the mixer-first receivers [41,34,42,43,17,44,45,18,46,47,48,49,50,51,52,53,54,55,56,57,58] have been proposed to achieve high linearity. Since this work also proposes a mixer-first receiver, the main properties of the mixer-first receivers are briefly discussed along with the relevant literature.…”

“…The HD3 varies 7dB across the simulated PVT variation. This corresponds to an OIP3 change of 3.5dB which is significantly less than some other techniques achieving high linearity [152,56], so calibration circuits are not required to optimize the linearity. The solid lines in Fig.…”